Rele T2, let's talk about it again

So this is the automation

And this are the settings of the T2 module (the decoupled switch mode is enabled for both)

Change here.


My switches are buttons so I have to keep it that way, but anyway I already tried, and of course it’s a little faster, but there’s still some delay

If you have a button, try connecting a “dumb” relay to relay T2 according to the diagram. Probably, when there is an on/off of the “dumb” relay, T2 will perceive it as a pulse. I repeat once again, these are my suggestions, I have not tested them.

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So, I tested a lot more and I came to a conclusion, I tryed the switch H2 EU. So, there are delays that are software related, but only minor. There are software problems, like action started on button release and not on pressing, and a specific misconfiguration I think of the relay delay that works like a multi-function switch, so more delay for no reason. But anyway the real conclusion is that I’m seeing a delay that it’s not fault of software or anything else, it’s the network, not mine, the communication itself, I’m seeing like the 100/150/200ms of delay that is the base of the thread/zigbee standard, so it’s not all Aqara’s fault. Anyway I contacted them and sent some feedback on some actual problems (like the before mentioned), but for now, I’ll stay updated on what the technology will achieve, and wait for new tech or updates, so thank you for all your help

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Hi @gafich10 one of my issues (S1 On not turning off after dumb relay opens) was due tk the dumb relay being a pulse one.
Replaced by the proper one and it works.

I have another question (I didn’t find a proper answer in aqara manuals). Can I connect to S1 and COM 24V? I found out that I have a 24V output in the motor board that is only energized when the motor is running. That way the dumb relay wouldn’t be needed.

Thank you one more time.

Hello, unfortunately, relay T2 does not work with COM and S1(S2) at a voltage of 24 volts. I wrote this.

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Hi @gafich10 , me again :grinning:
After reading again your amazing explanations I ended with the following diagram and T2 configuration. Would it be possible to have your validations and more than valuable comments? :grinning:

What is the voltage here? 220 or 24 +/-?

If it’s 220, then you need to do this.


@gafich10 thx for the prompt response .

L and N is 220V.

The Dumb relay is 24V.

S1 doesn’t control anything, is the switch emulator for Aqara T2 identify a status change.

L2 is to control a 220V bulb. Only Load wire goes into L2.

S2 is connected to wall switch, to control the bulb.

Being dumb relay connected to 24v, I think I can’t connect T2 LIN to it, right?

I’m using T2 to trigger an automation when S1 change status, and L2 to turn on a 220V Bulb also controlled by S2. Shouldn’t it be wet mode to provide 220V Live to L2 (bulb load)?

If the marked circles have 220 volts, then your circuit is working. You just used the “+” and “-” signs in the picture, which means constant voltage, so I thought it was 24 volts.

Exactly. And regarding T2 configuration, can I do it as in the screenshots I placed?

Thank you!!!

Yes :+1:

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Hi @gafich10 , I m back :grinning:
There is something I still don’t fully understand.
When using the decoupled switch, should T2 still read when we use S1/COM?

Hi, remember, I’m always happy to help :slightly_smiling_face:.
No, in the resolved state you can’t control the state of T2 (read data).
And what’s your problem now?

Connect a low-power lamp to L1 (role of On or Off state) and use it as information for automation(by power):slightly_smiling_face:

Hi @gafich10 ,
It already works as I wanted. I tried the 220v relay and it worked, but… I found out that the door motor has a 24v output to connect a flashing lamp when and only the motor is running. So I used a solid state 24v relay with dry contacta and it also works. The thing is that as it flashes, the 24v are only present in cycles of 1 sec. Is the motor output that makes it flash with 24v cycles.
What I did was an automation that only works one time and then I have another automation to enable the first automation when some conditions are met.
But the T2 Relay, as is receiving in S1/COM 1 sec on/off, makes the T2 relay to enable L1 on off (I can hear the mechanical click) Doesn’t have any impact for me aside that I don’t know if it will not damage prematurely T2.
I was wondering if it wouldn’t be possible to continue to have S1/COM detecting the status change but not triggering L1. Thought decouple option would work, but it doesn’t.
I already have a solution, to replace solid state relay by a temporized relay. This type of relay (very cheap) gets the first 24v signal and closes the dry contact for the period of time I setup, ignoring that way more 24v signals coming from the motor.
But I would like to keep the solid state relay, any thoughts?
Thank you!!!

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Hi, I have some ideas, but give me screenshots of your automations. I will understand their essence and give you some tips.

Hi again @gafich10 ,

Quite simple automation.
T2 Config

The automation when motor is running

Second automation that enables first one when door is closed

I have some more automation to enable disable sensors that are acting as trigger to alarm.
I still need to connect to T2 S2 and L2 the garage lights to turn on when running the first automation